Welder is a vocational trade This trade taken around one year. It is a tradesperson who parfect in fusing materials together. The course syllabus offers study such as welding skills and metal working techniques used in the exploration of metal sculpture; oxy-fuel and plasma arc cutting, hot and cold working of steel, shielded metal arc welding, weld design and finishing techniques; emphasized through hands on instruction and practice with the opportunity for creative expression and practical application. It open various job option for candidates after its successful completion. Candidates can get work in the aerospace, defence, ship building, construction and automotive industries on a large scale.
| Duration | 1 years |
| Type | ITI Diploma |
| Eligibility | 10th |
(Duration: One Years)
NSQF LEVEL- 3
During the one-year duration of “Welder (GMAW & GTAW)” trade, a candidate is trained on Professional Skill, Professional Knowledge, Engineering Drawing, Workshop Calculation & Science and Employability Skill related to job role. In addition to this, a candidate is entrusted to undertake project work, extracurricular activities and on-the-job training to build up confidence. The broad components covered under Professional Skill subject are as below:
Trainee learns about elementary first aid, firefighting, environment regulation and housekeeping etc. Performs joining of MS sheet by Gas welding in different positions, Joins MS plates by SMAW in different positions, performs straight, bevel & circular cutting on MS plate by Oxy-acetylene cutting process. The trainee leans joining of different types of MS pipe by Gas welding (OAW), SMAW. The Trainee sets up GMAW/ GTAW plant and weld M.S, S.S and Aluminium sheets in all positions, performs Arc gauging on MS plate, joins MS/ Aluminium /SS sheets/plates by GMAW, GTAW & FCAW process in various positions using different modes of metal transfer. Cuts ferrous and non-ferrous metal using plasma Arc cutting. The trainee tests welded joint by visual inspection Dye penetrant & Magnetic particle testing methods.
Professional Knowledge subject is simultaneously taught in the same fashion to apply cognitive knowledge while executing task. In addition components like Physical properties of engineering materials, different types of iron, properties and uses. In addition to above components the core skills components viz., Workshop calculation & science, Engineering drawing, employability skills are also covered. These core skills are essential skills which are necessary to perform the job in any given situation
| Sr No. | Course Element | National Training Hours |
|---|---|---|
| 1 | Professional Skill (Trade Practical) | 1000 |
| 2 | Professional Knowledge (Trade Theory) | 280 |
| 3 | Workshop Calculation & Science | 80 |
| 4 | Trade Engineering Drawing | 80 |
| 5 | Employability Skills | 160 |
| Total | 1600 |
Distribution of training on Hourly basis: (Indicative only)
| Total Hours/Week | Trade Practical | Trade Theory | Work shop Cal. &Sc. | Engg. Drawing | Employability Skills |
|---|---|---|---|---|---|
| 40 Hours | 25 Hours | 7 Hours | 2 Hours | 2 Hours | 4 Hours |
For the purposes of determining the overall result, weightage of 100% is applied for six months and one year duration courses and 50% weightage is applied to each examination for two years courses. The minimum pass percent for Trade Practical and Formative assessment is 60% & for all other subjects is 33%. There will be no Grace marks.
Welder Gas: Fuses metal parts together using welding rod and oxygen acetylene flame. Examines parts to be welded, cleans portion to be joined, holds them together by some suitable device and if necessary makes narrow groove to direct flow of molten metal to strengthen joint. Selects correct type and size of welding rod, nozzle etc. and tests welding, torch. Wears dark glasses and other protective devices while welding. Releases and regulates valves of oxygen and acetylene cylinders to control their flow into torch. Ignites torch and regulates flame gradually. Guides flame along joint and heats it to melting point, simultaneously melting welding rod and spreading molten metal along joint shape, size etc. and rectifies defects if any.
Welder Electric: Fuses metals using arc-welding power source and electrodes. Examines parts to be welded, cleans them and sets joints together with clamps or any other suitable device. Starts welding power source and regulates current according to material and thickness of welding. Connect one lead to part to be welded, selects required type of electrode and clamps other lead to electrode holder. May join parts first at various points for holding at specified angles, shape, form and dimension by tack welding. Establish arc between electrode and joint and maintain it throughout the length of the joint.
Gas Cutter:Cuts metal to require shape and size by gas flame either manually or by machine. Examines material to be cut and marks it according to instruction of specification. Makes necessary connections and fits required size of nozzle in welding torch. Releases and regulates flow of gas in nozzle, ignites and adjusts flame. Guides flame by hand or machine along cutting line at required speed and cuts metal to required size.
Welder (GMAW & GTAW) while doing Gas Tungsten Arc welding (GTAW) also known as Tungsten Inert Gas (TIG) weldingreads fabrication drawing, examines parts to be welded, cleans them and sets joints with clamps or any other suitable device. Selects suitable tungsten electrode, grinds the edges and fit in to the GTA welding torch. Selects gas nozzle and fit in to the GTA welding torch. Selects suitable filler rods and cleans them. Connects work piece with earth cable, Connects the machine with Inert gas Cylinder, regulator and flow meter. Starts the constant current GTA welding machine, sets suitable welding current & polarity and inert gas flow. Establish arc through across a column of highly ionized inert gas between work piece and Tungsten electrode. Melts the metal and deposit weld beads on metal surfaces by passing the suitable filler rod in to the weld puddle. Joins Steel, Stainless steel & Aluminium sheets and Aluminium & SS tubes .
Welder (GMAW& GTAW) while doing Gas Metal Arc welding also known as MIG/MAG Weldingreads fabrication drawing, examines parts to be welded, cleans them and sets joints with clamps or any other suitable device. Connects work piece with earth cable. Connects the machine with suitable gas Cylinder, regulator and flow meter. Connects preheater when CO2 is used as shielding gas. Selects suitable wire electrode, feed it to welding GMA Welding torch through wire feeder. Selects contact tip gas nozzle and fit in to the GMA welding torch. Preheats joints as required. Starts the Constant Voltage GMA welding machine, sets suitable welding voltage & wire feed speed and shielding gas flow, produces arc between work piece and continuously fed wire electrode. Melts the metal and deposit weld beads on the surface of metals or joins metal pieces such as Steel, Stainless steel and aluminium metals. Also will do mixed shielding gas welding. May experience with tubular wire welding called Flux Cored Arc Welding (FCAW).
Plan and organize assigned work and detect & resolve issues during execution in his own work area within defined limit. Demonstrate possible solutions and agree tasks within the team. Communicate with required clarity and understand technical English. Sensitive to environment, self-learning and productivity.
| Paper Code | Subject Name |
|---|---|
| 1 | Professional Skill (Trade Practical) |
| 2 | Professional Knowledge (Trade Theory) |
| 3 | Workshop Calculation & Science |
| 4 | Trade Engineering Drawing |
| 5 | Employability Skills |